Water-meter.



L. H. NASH.

WATER MEIER. APPLICATION FILED JUNE 2311911.

1 9 1 5@, 9 5 5 D Patented Aug. 24, 1915.

2 SHEETSSHEET l.

L. H. NASH.

WATER METER.

APPLICATION FILED JUNE 28. IBM.

1 150 955 Patented Aug. 24, 1915.

2 SHEETSSHEET 2.

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LEWIS HALLOCK NASH, OF SOUTH NOB/WALK, CONNECTICUT.

WATER-METER.

Application filed June 28, 1911.

To all whom it may concern Be it known that I, LEwis HALLOCK NASH, a citizen of the United States, and a resident of South Norwalk, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in \Va- 4 ter-Meters of which the following is a specificaltion.

My'invention relates to improvements in water meters of that general character or type adapted to be interposed in a conduit or main to measure the amount or rate of flow of liquid through the same.

The present invention has particularly to do with that type of meters known as combination meters, which type includes a plurality of measuring and registering devices, one of which measures the low rates of flow, while another will become efiective to measure the rate of flow only when the latter exceeds the capacity of the meter measuring the low rate.

The invention consists in the improved combination and arrangement of parts and mechanisms in operative combination to be fully described hereinafter and the novelty of which will be particularly pointed out and distinctly claimed.

I have fully and clearly illustrated-my invention in the accompanying drawings to be taken as a part of this specification, and wherein,

Figure 1 is a view in longitudinal vertical section through a mechanism vor structure embodying my invention; Fig. 2 is a top tions with necks or extensions 2, 3, adapted Specification of Letters Patent. Patented Aug, 24, 1915.

Serial No. 635,811.

Located within the casing is a chamber walls 5, 6 and 7 connecting the side walls of the casing, the wall 5 being spaced from the end wall of thecasing at the inlet to provide a passage 8 for a purpose to be presently described. The wall 5 extends from the top of the body of the casing to a point short of the bottom wall of the latter to provide a passage 9, the walls 6 and 7 being connected to the top and bottom walls respectively ofthe casing and terminating short of each other to provide a passage 10, said passage opening into an extension 11 of the chamber 4. The partition 7 heretofore referred to, and the partition 6 with the extension 11, divide the casing into two chambers or passages 4 and 12, the former of which is adapted to contain measuring mechanism for large flows or velocities, and the secondof which contains a mechanism for small flows or velocities.

Extending over the casing is a closure plate 13 consisting of upper and lower webs 13 14, respectively, through which is a. passage 15 which is defined by a web 16 uniting saidwebs 13?, 14 and forming a passageway from a point exterior of the casing to the interior of the chamber 4:. Around the Wall or web 16 are oppositely disposed passages 17 17 which unite at one end, and when the closure plate is in place register at their point of union with the passageway 8. The passages 17 17 and 15 are located over the chamber 4, and said passageways 17- unite at a point intermediate the ends of the closure as at 17 where they open into a chamher 18 located over the chamber 12 of the casing. By this arrangement as hereinafter described water may flow to the casing u the conduit 8, through the conduits 17 1 and into the chamber 18 without passing through the chamber 4 and afi'ecting the measuring mechanism associated therewith as will behereinafter set forth.

I will now proceed to, describe the construction and arrangement of the measuring and registering mechanisms, in so far as it may be necessary to complete understanding of the invention. The lower end of the wall 5 and the upper end portion ofthe wall 6 are connected by a horizontal partition 19 having an opening 20, through which extends a cylindrical open-ended barrel 21 having an intermediate annular collar 22 adapted to rest on the said partition 19, whereby the barrel is vertically supported upon said partition, the ends of the barrel respectively projecting into the chamber 4 and into that portion of the casing below the partition 19. Supported by the lower portion of the barrel 21 is a bearing 23 for the shaft 24 of the screw 25, the upper end of said shaft having a bearing in a structure 26 supported by the upper end of said barrel. At this upper end the shaft 24 of the driving screw 25 is geared by suitable gearing, indicated generally at 27, to register mechanism 28 which is supported on a cap plate 29 closing the passageway 15 heretofore described.

The specific construction of the Ineasur-' uring mechanism 31 of the low capacity, meter, which mechanlsm is geared through gearing 32 to register mechanism 33 supported upon the upper face of a cap plate 34 closing an opening 35 in the plate 13 over said measuring mechanism. By this arrangement the water which flows up the passage 8 and byway of the passages 17, 17 into the chamber 18 will pass through the measuring mechanism of the low capacity measuring mechanism and then to the outlet side of the main casing. The chamber extension 11 is formed with upper end lower horizontal walls having alining openings 36, 37, in which respectively are seated annular conical valve seats 38, 39, the opening through the valve seat 38 being larger than the openingthrough the seat 39 for a purpose to be presently described. Operating upon these valve seats 38, 39 are the Valve plates 40, 41 of a differential, pressure operated valve which may be of the double beat type. The area of the face of the upper: valve plate within the chamber 11 and the area of the corresponding face of the lower valve plate are the same, but the effective area of the upper plate to pressure within the chamber. 11 is increased by the addition of the conical face of the upper valve, substantially half'the area of which is subjected to pressure, as is well known in this type of valve. The upper valve plate carries a superposed plate 42 having an overhanging or extending flange 43 in order to increase the area of the upper valve under conditions to be presently set forth. As is usual with double beat valves the heads are connected by guiding and spacing bars 44 which maintain the valves centered on their seats and guide them in their up and down movements. The bottom valve may also-be provided with the usual cage 45 to guide it in its movement.

In service, the parts being arranged and I constructed as described the operation of the invention is as follows, it being understood that the measuring mechanism operating withinthe chamber 4 is intended to measureis to come within the capacity ofthe smaller meter the water will flow through the barrel and will fill the chamber 4 and its extension 11, and in addition the water will pass up the passage 8 through the passages 17 into the chamber 18 and through the measuring mechanism 31, under whichconditions the pressure in the chamber 11 is not suflicient to overcome the weight of the valve, and the pressure in the chamber 12, and to lift said valve from its seat, whereby as soon as the chambers 4 and 11 are filled the measuring mechanism in the chamber 4 will cease to operate and only the water passing up the passage 8 thence through the passages 17 and chamber 18 to the small meter will be measured, and this continues as long as the pressure in the chamber 11 is too low to lift the valve.

Should the rate of flow or the velocity increase beyond the capacity ofthe small meter it will be understood that there will be an increase in pressure within the chamber 4 and its extension 11 which will serve to lift said valve plates from their seats. As soon as the upper valve starts to move from its seat the area of the overhanging portion 43 will be subjected to the pressure in the chamber '11 and the valves will thereby be quickly and sharply opened to permit free flow through the chamber 4. This raising of the valve will permit a free flow of water upward through the barrel 21, which will serve to rotate the screw 25 to drive the register mechanism 28'so that the two register mechanisms work together and their combined totals will show the total flow as long as the pressure is suflicient to maintain the double beat valve in open position. When 7 the valve is open, in addition to the difi'erence in area between the valve plates exposed to the chamber pressure, the upper plate will have added to it the area of the under face of the plate 43 so that the valve is held positively open and will not close to tion is limited by the depending lower edge of the chamber so that the valve cannot be lifted high enough to dislodge the lower end of the same from the'seat 39. This com bined operation of the two measuring mechanisms continues as long as the velocity of the flow is high enough to maintain the valves 40 and 41 open, but as soon as the pressure drops to a point where the pressure in the chamber 11 is insufficient to hold the valves open, the valves will be seated so as to out off the flow through the chambers 4 and 11, which will result in the stopping of the operation of the measuring mechanism for the high rates of flow, the small meter continuing to operate to measure the fiow through the casing.

What I claim and desire to secure by Letters Patent of the United States is 1. In a combination meter, a casing having two passages open to the same supply, a measuring mechanism in each passage, one

of said passages being normally open to permit continuous flow therethrough, the other passage having a chambered extension projecting into the passage of continuous flow, said extension being provided with oppositely disposed valve seats, connected valve plates cooperating with said seats and having difierential areas within the extension,

and one of said valve plates having an increased area available to the pressure in the extension when the valves are moved to open position.

2. In a combination meter, a casing having two passages, a measuring mechanism in each passage, independent passageways for conducting fluid from a common source to said passages, one of said passages being unobstructed at all times for the free flow of the fluid therethrough, and a difierential valve controlling the flow through the other of said passages and exposed to the pressures within both of said passages.

3. In a combination meter, a casing having two passages, a measuring mechanism in eacltp assage, independent passageways for conducting fluid from a common source to said passages, one of said passages being unobstructed at all times for the free flow of, the fluid therethrough, and a differential double beat valve controlling the flow through the other of said passages and exposedto the pressures within both of said passages.

In testimony whereof I have hereunto slgned my name in the presence of two subscribing witnesses.

LEWIS HALLOGK NASH.

-Witnesses:

M. E. MCNINCH, C. G. HEYLMUR. 

